The average of 10 numbers is 42. If each number is increased by 5, then what will be the new average?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 47.
Given that
The average of 10 numbers = 42
Average = sum of observations / total numbers of observations
⇒ 42 = sum of numbers / 10
⇒ 420 = sum of numbers
If each number is increased by 5, the net increase = 5 × 10 = 50
Hence new sum = 420 + 50 = 470
New average = = 47